NE58633 datasheet, PDF - EEWORLD Datasheet

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NE58633: DescriptionNoise reduction class-D headphone driver amplifier; File Size230KB，27 Pages; ManufacturerNXP; Websitehttps://www.nxp.com

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NE58633 Overview

Noise reduction class-D headphone driver amplifier

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NE58633

Noise reduction class-D headphone driver ampliﬁer

Rev. 02 — 25 May 2009

Product data sheet

1. General description

The NE58633 is a stereo, noise reduction, class-D, Bridge-Tied Load (BTL) headphone

driver ampliﬁer. Each channel comprises a class-D BTL headphone driver ampliﬁer, an

electret microphone low noise preampliﬁer, feedback noise reduction circuit and a music

ampliﬁer input.

The NE58633 operates with a battery voltage of 0.9 V to 1.7 V. The chip employs an

on-chip DC-to-DC boost converter and internal V

ref

voltage reference which is ﬁltered and

output to ground for noise decoupling. It features mute control and plop and click reduction

circuitry. The gain of the microphone ampliﬁer and ﬁlter ampliﬁer is set using external

resistors. Differential architecture provides increased immunity to noise.

The NE58633 is capable of driving 800 mV

rms

across a 16

Ω

or 32

Ω

load and provides

ElectroStatic Discharge (ESD) and short-circuit protection.

It is available in the 32-pin HVQFN32 (5 mm

5 mm

0.85 mm) package suitable for high

density small-scale layouts and is an ideal choice for noise reduction headphones and

educational audio aids.

2. Features

Low current consumption of 4.4 mA

0.9 V to 1.7 V battery operating voltage range

1 % THD+N at V

= 1 V

driving 16

Ω

with a battery voltage of 1.5 V

10 % THD+N at 800 mV

rms

output voltage driving 16

Ω

and 32

Ω

loads with a battery

voltage of 1.5 V

Output noise voltage with noise reduction circuit typically 31 mV

rms

for G

v(cl)

= 25 dB

On-chip mute function

Plop and click reduction circuitry

Class-D BTL differential output conﬁguration

Electret microphone noise reduction polarization ampliﬁer with external gain

adjustment using resistors

Music and ﬁlter ampliﬁer with external gain adjustment using resistors

DC-to-DC converter circuitry (3 V output) with 2.5 mA (typical) load current

Internal voltage reference pinned out for noise decoupling

Available in HVQFN32 package

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